I have a projectile which I fire using the mouse coords as the direction vector which I scale with a velocity vector and add a gravity vector to complete this simple simulation.

I want to scroll the background in some elegant way, so that I can keep the projectile centred in the red (viewport) whilst following it until I can no longer centre it, but watch it hit the ground.

How is this situation usually solved?

I have a projectile which I fire using the mouse coords as the direction vector which I scale with a velocity vector and add a gravity vector to complete this simple simulation.

I want to scroll the background in some elegant way, so that I can keep the projectile centred in the red (viewport) whilst following it until I can no longer centre it.

Edit:

When the projectile starts it will be at the left edge so I cannot centre here as there's no room outside the scene, same if the projectile gets to the end of my scene.

How is this situation usually solved?